Cosmic Birefringence and the Chiral Geometry of Spacetime: Evidence for Bulk Torsion from CMB Polarization Anomalies

We address the anomalies in the polarization of the Cosmic Microwave Background (CMB). Standard cosmology assumes parity conservation in the photon sector. However, recent analyses (Minami & Komatsu, 2020) hint at a non-zero rotation of the polarization plane (beta approx 0.35 degrees). We propose that this Cosmic Birefringence is not due to local dust or systematic errors, but is a fundamental geometric effect induced by the Topological Torsion of a higher-dimensional Bulk-Brane system. We derive the modified Maxwell equations from a 5D Chern-Simons Lagrangian coupled to the Bulk Gravitomagnetic field identified in previous works. We show that the photon propagates through a "twisted" spacetime fabric inherited from the rotating parent singularity (the source of Baryogenesis). We calculate the expected rotation angle beta as a function of the Axion-like background field generated by rotational superradiance, demonstrating that the observed value corresponds to the residual chirality of the vacuum. This unifies Electromagnetism, Gravity, and Matter generation under a single parity-violating geometric mechanism.